<template>
    <div>
        <!-- 面包屑导航 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>

    <!-- 卡片 -->
    <el-card> 
        <el-row>
            <el-col>
                <el-button type="primary" @click="addRoleDialog">添加角色</el-button>
            </el-col>
        </el-row>
        
         <el-table :data="rolesList" border stripe>
             <el-table-column type="expand">
                 <template slot-scope="scope">
                     <el-row v-for="(item1, i1) in scope.row.children" :key="item1.id" :class="['bdbottom', i1 === 0 ? 'bdtop' : '']" class="vcenter" >
                         <el-col :span="5" >
                                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                                <i class="el-icon-arrow-right"></i>
                         </el-col>
                         <el-col :span="19">
                             <el-row v-for="(item2, i2) in item1.children" :key="item2.id" class="vcenter" :class="['bdtop', i1 === 0 ? '' : 'bdtop']">
                                 <el-col :span="6" >
                                     <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                                     <i class="el-icon-arrow-right"></i>
                                 </el-col>
                                 <el-col :span="18">
                                     <el-tag v-for="(item3, i3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row, item3.id)">{{item3.authName}}</el-tag>
                                 </el-col>
                             </el-row>
                         </el-col>
                     </el-row>
                 </template>
            </el-table-column>
                <el-table-column type="index">
                </el-table-column>
                <el-table-column prop="roleName" label="角色名称">
                </el-table-column>
                <el-table-column prop="roleDesc" label="角色描述" >
                </el-table-column>
                <el-table-column label="操作" width="300px">
                    <template slot-scope="scope">
                       <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
                       <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
                       <el-button type="warning" icon="el-icon-search" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                    </template> 
                </el-table-column>
            </el-table>
    </el-card>

    <!-- 分配权限树 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
    <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="desKeys" ref="treeRef"></el-tree>
    <span slot="footer" class="dialog-footer">
    <el-button @click="dialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
</el-dialog>

<!-- 添加角色对话框 -->
        <el-dialog
            title="添加角色"
            :visible.sync="addRoleDialogVisible"
            width="50%" @close="addRoleDialogClosed"
            >
            <el-form ref="addRoleRef" :model="addRole" :rules="addRoleRules"   label-width="80px">
                <el-form-item label="角色名称" prop="roleName">
                <el-input v-model="addRole.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                <el-input v-model="addRole.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
              <el-button @click="addRoleDialogVisible = false">取 消</el-button>
              <el-button type="primary" @click="addRoles">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>

<script>
export default {
    data() {
        return {
            rolesList: [],
            rightsList: [],
            setRightDialogVisible: false,
            treeProps: {
                label: 'authName',
                children: 'children'
            },
            desKeys: [],
            roleId: '',
            addRoleDialogVisible: false,
            addRole: {
                roleName: '',
                roleDesc: ''
            },
            addRoleRules: {
                 roleName: [
                    {required: true, message: '请输入角色名称', trigger: 'blur'},
                    {min: 2, max: 10, message: '用户名长度在2到10个字符之间', trigger: 'blur'}
                ],
                roleDesc: [
                    {required: true, message: '请输入角色描述', trigger: 'blur'},
                    {min: 3, max: 15, message: '用户名长度在3到15个字符之间', trigger: 'blur'}
                ]
            }

        }
    },
    created() {
        this.getRolesList()
    },
    methods: {
        async getRolesList() {
            const {data: res} = await this.$http.get('roles')
            if(res.meta.status !== 200) {
                return this.$message.error('获取角色列表失败')
            }
            this.rolesList = res.data
            // console.log(this.rolesList);
        },
        async removeRightById(role, rightId) {
            const confirmResult = await  this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)
            if(confirmResult !== 'confirm') {
                return this.$message.info('取消删除')
            }
            const {data: res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
            if(res.meta.status !== 200) {
                return this.$message.error('删除失败')
            }
            role.children = res.data
        },
        async showSetRightDialog(role) {
            this.roleId = role.id
            const {data: res} = await this.$http.get('rights/tree')
            if(res.meta.status !== 200) {
                return this.$message.error('获取权限失败')
            }
            this.rightsList = res.data
            this.getLeafKeys(role, this.desKeys)
            this.setRightDialogVisible = true
        },
        getLeafKeys(node, arr) {
            if(!node.children) {
                return arr.push(node.id)
            }
            node.children.forEach(item => this.getLeafKeys(item, arr))
        },
        setRightDialogClosed() {
            this.desKeys = []
        },
        async allotRights() {
            const keys = [...this.$refs.treeRef.getCheckedKeys(), ...this.$refs.treeRef.getHalfCheckedKeys()]
            const idStr = keys.join(',')
            const{data: res} = await this.$http.post(`roles/${this.roleId}/rights`, {rids: idStr})
            if(res.meta.status !== 200) {
                return this.$message.error('分配权限失败')
            }
            this.$message.success('分配权限成功')
            this.getRolesList()
            this.setRightDialogVisible = false
        },
        addRoleDialog() {
            this.addRoleDialogVisible = true
        },
        addRoleDialogClosed() {
            this.$refs.addRoleRef.resetFields()
        },
        addRoles() {
            this.$refs.addRoleRef.validate(async valid => {
                if(!valid) return
                const {data: res} = await this.$http.post('roles', this.addRole)
                if(res.meta.status !== 200) {
                    this.$message.error('添加角色失败')
                }
                this.$message.success('添加角色成功')
                this.addRoleDialogVisible = false 
                this.getRolesList()
            })
        }
    }
}
</script>

<style lang="less" scoped>
    .el-tag {
        margin: 7px;
    }
    .bdtop {
        border-top: 1px solid #eee;
    }
    .bdbottom {
        border-bottom: 1px solid #eee;
    }
    .vcenter {
        display: flex;
        align-items: center;
    }
</style>